Limits for iCloud Contacts, Calendars, Reminders, and Bookmarks

To help iCloud keep your Contacts, Calendars, Reminders, and Bookmarks up to date, keep your information within these limits.

Calendars and Reminders

Total number of calendars, events, and reminders: 50,000

Maximum combined number of calendars and reminder lists you can have: 100

Maximum size of all calendar and reminder data (not including attachments): 1GB

Maximum size of a calendar event including attachments: 20MB

Maximum number of attachments per event: 20

Maximum number of attendees you can invite to an event: 300

Maximum number of people with whom you can share a private calendar: 100

Maximum number of characters in a reminder title: 1000

Contacts

Total number of contact cards: 50,000

Maximum size of a contact card: 256KB

Maximum size of a contact photo: 224KB

Maximum size of a contact group: 256KB

Maximum size of all contact cards:

Card text: 48MB

Card photos: 200MB

Supported file types for a contact photo: JPEG, BMP, PNG, GIF

vCard import limits:

Total number of vCards: 50,000

Maximum size of a vCard: 256KB (photo + text)

Maximum photo size for a vCard: 224KB

Bookmarks

Total number of bookmarks: 25,000

Maximum size of a bookmark: 4KB

Maximum size of all bookmarks: 24MB

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